ffmpeg简单使用(1)-转码、添加字幕

h.264 转 h.265

$ ffmpeg -i source [H264video] -i -c:v libx265 [outputVideo]

e.g.

$ ffmpeg -i billions.s01e02.1080p.bluray.x264.mkv -c:v libx265 billions.s01e02.1080p.bluray.x265.mkv

添加字幕

$ ffmpeg -i source Video.mkv -i source Subtitle.srt -c copy outputVideo.mkv

e.g.

$ ffmpeg -i billions.s01e01.1080p.bluray.x265.mkv -i Billions.S01E01.Pilot.720p.BluRay.x264.srt -c copy billions.s01e01.1080p.bluray.x265-ch.en.mkv

批量处理

Mac & Linux下可以使用shell批量处理，Win下使用Python批量处理：

import os

video_format = '.mkv'
episode_num = 3
path = ‘C:\Billions.S01.1080p.BluRay.x264\srt'

file_list = os.listdir(path)

video_list = [file for file in file_list if file.endswith(video_format)]
print(video_list)

for num, video in enumerate(video_list, start=episode_num):
    # print(num, video)
    # command = 'ffmpeg -i {0} -i billions.s01e0{1}.srt -c copy billions.s01e0{1}.1080p.bluray.x264-ch.en.mkv'.format(video, num)
    command = 'ffmpeg -i {0} -c:v libx265 billions.s01e0{1}.1080p.bluray.x265.ch.en.mkv'.format(video, num)
    os.system(command)

转换文件编码格式(GBK -> UTF-8)：

import os
import codecs
import chardet

def convert(file, in_enc="GBK", out_enc="UTF-8"):
    """
    该程序用于将目录下的文件从指定格式转换到指定格式，默认的是GBK转到utf-8
    :param file:    文件路径
    :param in_enc:  输入文件格式
    :param out_enc: 输出文件格式
    :return:
    """
    in_enc = in_enc.upper()
    out_enc = out_enc.upper()
    try:
        print("convert [ " + file.split('\\')[-1] + " ].....From " + in_enc + " --> " + out_enc )
        f = codecs.open(file, 'r', in_enc, errors='ignore')
        new_content = f.read()
        codecs.open(file, 'w', out_enc).write(new_content)
    # print (f.read())
    except IOError as err:
        print("I/O error: {0}".format(err))

def list_folders_files(path):
    """
    返回 "文件夹" 和 "文件" 名字

    :param path: "文件夹"和"文件"所在的路径
    :return:  (list_folders, list_files)
            :list_folders: 文件夹
            :list_files: 文件
    """
    list_folders = []
    list_files = []
    for item in os.listdir(path):
        file_path = os.path.join(path, item)
        if os.path.isdir(file_path):
            list_folders.append(item)
        else:
            list_files.append(item)
    return (list_folders, list_files)


#将路径下面的所有文件，从原来的格式变为UTF-8的格式
if __name__ == "__main__":
    path = r'Z:\影音\剧\Billions.S01.1080p.BluRay.x264-ROVERS[rartv]\亿万1BD-DEMAND'
    (list_folders, list_files) = list_folders_files(path)

    print("Path: " + path)
    for file_name in list_files:
        file_path = os.path.join(path, file_name)
        # filePath = path + '\\' + fileName
        with open(file_path, "rb") as f:
            data = f.read()
            encoding_type = chardet.detect(data)['encoding']
            convert(file_path, encoding_type, 'UTF-8') # GB18030